The new Platinum Duo from Acumen solves the problem of battery maintenance for anyone lucky enough to have two bikes in their garage, because it is capable of monitoring and charging two batteries simultaneously. Like the original Platinum, this microprocessor-based unit tests, charges, maintains and recovers batteries automatically and is housed in a splash proof, attractive and robust extruded aluminium casing. However inside are dual independent charging circuits that enable the Platinum Duo to charge and maintain two batteries of different capacities, in separate machines or vehicles, at the same time. Better still, it only requires a single power socket for operation.